Improvement in lever-power of windlasses



NITED PATENT OFFICE..

PERRY DICKSON, 0F JERSEY CITY, NEW JERSEY.

IMPROVEMENT IN LEVER-POWER OF WINDLASSES, 8,O.

Specification forming part of Letters Patent No. 54,130, dated April 24, 1866.

To vall whom it may concern:

Be it known that I, PERRY DrcKsoN, of Jersey City, in the county of Hudson and State of New J ersey, have invented a new and Improved Application of Lever-Power for the Turning of Windlasses, Shafting &c. 5 and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable those skilled inthe art to make and use the same, reference being' had to the accompanying drawings, forming part of this specification, in whic Figure l is a side sectional view of my i11- vention, taken in the line .r x, Fig. 2; Fig. 2, a plan or top view of the same.

Similar letters of reference indicate corresponding parts.

This invention relates to a new and useful application ot' lever-power for operating windlasses and turning shaftin g, and has for its object the varying of the lever-power, so that speed may be obtained and power sacriced when the former and not the latter is required, and power obtained and speed sacriiioed when power is required.

The invention is applicable to various purposes-ordinary windlasses, hoisting-machines, ship windlasses, hand-cars for railroads, &c.

A represents a horizon tal shaft placedwithin a suitable framing, B, and having a pulley, C, upon it, the periphery of which is broader or wider than the body or main portion, so as to leave a projecting ange, c, at each side for dogs D to act against, a dog being at each side of the pulley. These dogs are pivoted at their inner ends, as shown at b, to collars E, placedloosely on the shaft A and having arms c projecting from them, said armsbein g connected by bars F to slides G G, which are placed on alever, H, the fulcrum dof which is at the upper part ofthe framing B. ,These slides G G are at opposite sides of the fulcrum d, and they are moved or adjusted toward or from each other by means of racks e on the slides and a pinion, f. which gears therein, said pinion being tted loosely on a Xed shaft, g, on the lever H, and having a crank, h, connected with it,.a wheel, z', having a notched periphery, being secured on the upper end of sbaftg to hold the crank, and consequently the slides G G, in any desired position within the scope of their movement.

The dogs D D act or bind against the flanges a a ot' the pulley C while rising, and, as one dog rises while the other falls, a continuous rotary motion in one direction is imparted to the shaft A by oscillating or vibrating the lever H.

The leverage power of this device, it will'be seen, may be readily varied by shifting the slides G G. The nearer the latter are to the fulcrum d the greater the power and slower the speed communicated to the shaft A, the reverse being the case by moving the slides from each other. Hence it will be seen that by this simple adjustment of the slides G G power is obtained when required and speed dispensed with, and speed-obtained when power can be dispensed with.

This is a valuable improvement and will prove to be a great acquisition for all windlasses, hoisting-machines, and in the turning of shafting generally through the medium of lever-power. In raising heavy bodies a good leverage-power is required, and speed may be willingly dispensed with to obtain it, and when light bodies are raised power is not required, and speed may be obtained and a saving of time effected.

The same advantages are obtained when the deviceis used for propelling a hand-car. Heavy bodies are frequently drawn and considerable power required to propel the car along. Speed is then dispensed with, and when the car is lightly loaded the leverage is reduced and speed obtained. A

I represents a brake, composed of a metal strap, j, one end of which is attached to the framing B and the other to a lever, J. This device, usually termed a friction-brake, is employed in hoisting` devices in order to regulate the descent ot' bodies, and the strap j passes around the pulley C beyond the ends of the dogs D, so that when the lever J is pressed down and the strap j drawn towardthe periphery of the pulley C the strap will come in contact with the ends a* of the dogs D, which extend beyond the periphery of the pulley, and press them back, so that the shoulders of the dogs which bind against the flan ges a of the pulley C will be forced back and said pulley relieved to allow the shaft A to rotate under the weight of' the raised or elevated article. This is an essential feature of the invention, for the dogs D D, when in contact with the flanges a of the pulley, will not allow said pulley to rotate in a backward direction. By this arrangement the pulley is relieved simultaneously with the applying of the friction-brake.

I do not claim the dogs D D, operated by lever-power, in connection with a pulley, C, for

Witnesses z M. M. LIVlNGs'roN,

ALEX. F. ROBERTS. 

